Cold Start Devices

Huw Powell human747 at
Thu Dec 19 15:23:12 EST 2002

> On an 87 4kq can someone tell me which device or decvices are responsible for
> enrichening the mixture during cold start?  Besides the Cold Start Valve
> which only is active for a few seconds.

The thermo sender on the bottom of the top radiator hose flange tells
the computer next to the glovebox that the engine is cold (or warm, or
hot), and the computer responds by 1. ignoring the OXS signal until it
is warm and 2. increasing the current to the control pressure actuator
which is the little grey thing mounted on the front of the fuel

Is it also time for the annual reminder to check those intake manifold
grounds?  The computer depends on them for proper function...

Huw Powell

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